[trtr013]

so i just saw Minimob has the tak 138 scut setup with 3 different head options. Anyone tried this kit? sounds pretty nice to have a 138 out of a crf50 frame

 

[smiffy]

i havent heard of anyone actually buying the 138 kit yet.



i was thinking about it but i dont like the thought of a super short piston.



anyone have a picture of the piston against a 124cc piston????

 

[burch753]

it is a scut piston but not as short as others....



but it is forged!!!! which I think is the biggest selling point for me!

 

[phatfiddy]

I personally wouldn't run a skirtless piston. Id stick with a 117 setup! Power with reliability If its built right the 117 is a very good running engine.

 

[smiffy]

when you say not as short as other what do you mean?



i ran the scut 106 setup for a bit and it realy didnt last lond at all.

 

[Z]

I have a Takegawa 138+R Crate motor will the full skirt 56mm piston and dedicated Takegawa cases.



I wouldn't run a SCUT 138. They flat out don't hold up over the long term.

 

[smiffy]

i have run a 56mm piston in a crf based bottom end and it worked great.



very reliable, would recommend building one if you want a big motor.



they do a 56mm stroker crank to fit in the crf cases, but i didnt go that far.

 

[BILLYBIGWIG]

i think you will find that the 138+R is infact a 57mm full skirt piston not a 56mm 56mm x 54mm is only a 132.9cc

 

[Z]

i think you will find that the 138+R is infact a 57mm full skirt piston not a 56mm 56mm x 54mm is only a 132.9cc

Yea, what he said.

 

[smiffy]

yes correct



57mm piston took the skirt out a little to far for my liking.



133cc was plenty, shame that motor is no more!

 

[smiffy]

guess you guys might be interested in te new 148 scut



SP TAKEGAWA Official Site

 

[taz69]

Hey Z would you OR Smiffy know the Takegawa part # to the 56mm piston you were using.

 

[burch753]

Hey Z would you OR Smiffy know the Takegawa part # to the 56mm piston you were using. I have one thats a 01-02-8242.. It was on a 124+R engine that takegawa made for a little while.. It was a 50mm crank by 56mm piston.. Works great on a 54mm crank as well with a 69mm cylinder.. Just looking to see what piston you guys were using???? And it was made for the Superhead +R with the older 28mm intake and what not..

They made a 56mm piston? forged? skirted?



Does anyone know if they made any forged pistons other than the 54mm for the old superhead and the 57mm (138) scut?



I love the idea of a 56 x 50 motor... how did it run?

 

[smiffy]

The piston i used was takegawa part#



01-02-0101



56mm skirted piston for the superhead+r - not forged



worked a treat and was the best engine i ever had.



59mm outer liner is the maximum outer diametre of skirt i would go in gb4 cases as they are quite week in comparison to the honda nice cases.

 

[firepower354]

They made a 56mm piston? forged? skirted?



Does anyone know if they made any forged pistons other than the 54mm for the old superhead and the 57mm (138) scut?



I love the idea of a 56 x 50 motor... how did it run?

Aaron, I can offset bore the Honda cases for a big setup, but the jug would likely need to be done too, since all the 56-57 bores I've seen were 69mm tall.

 

[smiffy]

i took a 124 takegawa cylinder and did exactly that, i couldnt find anyone at the time that did a cylinder to fit.



was a waste of a brand new +r barrel but hey i had to do it.

 

[taz69]

Terry does good work...

 

[smiffy]

Z had the 138 piston which is actually a 57mm piston.



could be done, but good luck trying to get a gasket to not leak on a crf (gb4) cased motor

 

[firepower354]

i took a 124 takegawa cylinder and did exactly that, i couldnt find anyone at the time that did a cylinder to fit.



was a waste of a brand new +r barrel but hey i had to do it.

LOL. I only wasted a DrATV $50 one Now, the Greek guy has them pretty cheap. I broke the 56 but the 57 is running with a 54mm Kitaco crank just fine.

 

[taz69]

z had the 138 piston which is actually a 57mm piston.



Could be done, but good luck trying to get a gasket to not leak on a crf (gb4) cased motor

10-4....